21464680751 has 8 divisors (see below), whose sum is σ = 21857025744. Its totient is φ = 21075886720.

The previous prime is 21464680739. The next prime is 21464680771. The reversal of 21464680751 is 15708646412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21464680751 - 2¹⁸ = 21464418607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21464680771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 875540 + ... + 899721.

It is an arithmetic number, because the mean of its divisors is an integer number (2732128218).

Almost surely, 2^21464680751 is an apocalyptic number.

21464680751 is a deficient number, since it is larger than the sum of its proper divisors (392344993).

21464680751 is a wasteful number, since it uses less digits than its factorization.

21464680751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775481.

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 21464680751 in words is "twenty-one billion, four hundred sixty-four million, six hundred eighty thousand, seven hundred fifty-one".